Antonio Area Freeway System
Interstate 10 West (Robert F. McDermott
|This page last updated February 12, 2023
||This page covers Interstate 10 northwest of
downtown San Antonio from I-35 to Ralph Fair Rd. Two miles of
I-10 is concurrent (multiplexed) with I-35 south of this segment; see
the I-35 South
page for details. Interstate 10 continues east of downtown;
see the I-10 East
page for more info.
Length: 16 miles
segment of I-10
serves the northwest corridor, one of the fastest growing areas of the
tremendous amount of the region's suburban office space is located in
corridor as are the headquarters for several large companies. The
corridor also serves the
continually-growing South Texas Medical Center district; Wonderland of
Americas mall (formerly known as Crossroads mall); the University of
Texas at San
(UTSA) main and downtown campuses; Six Flags Fiesta Texas; Joint Base
San Antonio Camp Bullis and Camp Stanley; and The Rim,
La Cantera, Landmark, Colonnade,
Huebner Oaks, and Fiesta Trails retail centers and mixed-use
developments. One suburban city, Balcones Heights,
also lies within
the corridor as does the unincorporated Leon Springs area. I-10
northward to the booming outlying areas of Fair Oaks Ranch, Boerne, and
County. Inside Loop 410, the route is lined with light
industrial and residential
areas. Heavy commercial development dominates the landscape
between Loop 410 and
La Cantera Blvd., with moderate and growing commercial and residential
development north of there all the way to Boerne.
is signed as east/west, this segment actually runs mostly north/south.
To avoid confusion, many locals give directions as "inbound" or
"outbound" (from downtown) instead; I use that convention here.
- 10 lanes double-decked (6 lanes
on the upper levels; 4 lanes on the lower level) from I-35/Frio St. to
- 10 lanes from Fulton Ave. to
with a short 8 lane section through the Loop 410 interchange.
lanes (5 inbound, 6 outbound) from Loop 410 to Wurzbach Rd.
from Wurzbach Rd. to Huebner Rd.
- 9 lanes
(5 inbound, 4 outbound) from Huebner Rd. to Loop
- 6 lanes from Loop 1604 to Ralph
- 2 HOV lanes (one each
direction) from La Cantera Blvd.
Ralph Fair Rd.
- Continuous access roads from I-35 to Frio St.
- No continuous access roads from Frio St. to
except on the inbound side between Woodlawn Ave. and Culebra Ave.
- Continuous access roads along remainder of route
north of Woodlawn Ave.
access road splits in Leon Springs. The west leg continues along the
freeway and ends at Boerne Stage Rd. The east leg passes through Leon
Springs and then continues northward to Ralph Fair Rd.
- Access road intersection bypass at Medical Dr.
for a list of I-10 West exits.
mph from I-35 to Fulton St.
- 65 mph from Fulton to La Cantera
- 70 mph from La Cantera Blvd. to
|SPECIAL FEATURES &
- US 87 concurrent (multiplexed)
along entire route.
- Double-decked from Frio St. to
- TransGuide coverage from I-35 to
Camp Bullis Rd.
Park & Ride
Loop 1604 (under interchange)
exit to I-35 northbound.
- Special double-height bridge rail barrier
on ramp to I-35 northbound.
- Unusual yield sign arrangement
at Loop 1604 interchange; click here
for more information.
- Two waterways
run longitudinally below the freeway:
- Martinez Creek between West Ave and Fresno Ave.
- San Pedro Creek between Frio St. and I-35
|Heavy to extremely heavy along entire route.
Regular morning and afternoon peak-period
congestion occurs on the
approaches to Loop
410 and I-35.
ANNUAL DAILY TRAFFIC
|W of Frio St.||159,000||161,000||186,834||187,306||159,210||178,837||+11.08%|
|S of Crossroads Blvd.||157,000||173,000||205,174||206,072||176,291||219,228||+26.72%|
|N of Callaghan Rd.||171,000||200,000||240,483||241,130||211,683||237,094||+18.55%|
|N of Huebner Rd.||138,000||172,000||182,092||182,384||156,823||183,673||+6.79%|
|N of DeZavala Rd.||163,000||207,000||184,375||199,029||172,205||202,353||-2.24%|
|N of UTSA Blvd.||112,000||156,000||153,716||156,092||135,523||183,419||+17.58%|
|N of Loop 1604W||69,000||106,000||116,529||121,393||103,442||150,152||+41.65%|
|N of Dominion Dr.||58,000||74,000||87,507||98,299||89,018||131,740||+78.03%|
|N of FM 3351||42,000||52,000||64,049||80,745||69,073||81,446||+56.63%|
for photos and video of this
- La Cantera Blvd. to Ralph Fair
Widen freeway to six general purpose lanes plus two HOV lanes. Click here for details
on this project.
view information for all projects in this
plans to add one general purpose lane and one HOV lane in each
direction from Ralph Fair Rd. to Boerne. There
is currently no funding or timeline for that
"stack" interchange was proposed at Loop 1604 as part of the Loop 1604 managed lanes project.
It will now be built as part of the Loop 1604 North expansion project.
section from Fredericksburg Rd. at Woodlawn Ave. to Culebra Ave. was
San Antonio's first expressway.
of the route from just north of Huebner Rd. to Leon Springs was part
of the original route of US 87 and
its predecessors US 290, US 385, SH 9, and SH 27. The short section of
Old Fredericksburg Rd. at Loop 1604 was bypassed by the current route
in 1934 as
part of the
Arneson Plan to improve state highways in Bexar County. The section of
I-10 today north of Leon Springs was also built in 1934 as part of the
Arneson Plan; prior to that, the route followed Boerne Stage Rd.
The first freeway sections to be
built were simply called "US 87 Expressway". It was briefly
"North Expressway" before being named the "Northwest Expressway" when
planning began for the US 281 "North Expressway". The
designation as I-10 was
authorized on October 1, 1959. The route was renamed as "McDermott
Freeway" ca. 1995
for Robert F.
McDermott, the former CEO of the USAA financial services corporation
headquarters are located adjacent to the freeway south of
- Late 1930s: The
section from Woodlawn Ave. to downtown was
included as part
of the original
three-legged expressway plan for San Antonio designed to provide bypass
around downtown for through traffic on the various US and state
United States' entrance into World War II delayed these plans until
after the war.
section from Fredericksburg Rd. at Woodlawn Ave. to Culebra Ave. opened
without fanfare. This was the first expressway in San Antonio and
appears to be the second in Texas, coming less than a year after the
Gulf Freeway opened in Houston and a month before the opening of
Central Expressway in Dallas.
28, 1949: The
section from Culebra Ave. to Frio
St. opened with the official ribbon-cutting for the entire Woodlawn
Frio St. section.
segment from Frio St. to Martin St. was completed.
- June 1955: Alignment
routing of the section from Woodlawn Ave.
to De Zavala Rd. A previous proposal in 1953 had I-10 further
east crossing Loop 410 at Vance-Jackson Rd., and a plan from around
showed it paralleling Fredericksburg Rd. roughly 2/3rd of a mile to the
section from Loop 410 to Fredericksburg Rd.
north of Huebner Rd. was completed including the interchange at Loop
1960: The segment from Woodlawn Ave. to Fresno Dr. opened.
1961: The section from Fresno Dr. to Loop 410 was
The section from Dominion Dr. to Boerne opened.
The ramps connecting I-35 North to and from I-10 West in the "Downtown
interchange were completed. Prior to this, there were only direct
connections between I-35 South and I-10 West. Traffic headed to and
from I-35 North had to exit and use the access roads
- 1968: The existing
segment of US 81 from Fredericksburg Rd. near Huebner to Dominion Dr.
was upgraded to a freeway.
First phase of Loop 1604 interchange completed.
Reconstruction and double-decking from I-35 to Hildebrand Ave.
Loop 1604 interchange completed.
The segment from Loop 1604
to Camp Bullis Rd. widened from four to six lanes.
music group REM filmed the video for their song "Everybody
Hurts" on the lower level at Woodlawn Ave. Producers had
wanted to use US 281 North at Loop 1604, but decided it looked too wide
in camera shots.
The section from
Loop 1604 south
to Fredericksburg Rd. (near Huebner) widened from four to six lanes.
coverage added to the section south
of Hildebrand Ave. as part of the original TransGuide project.
segment from Fredericksburg Rd. south to Wurzbach Rd. was expanded from
to eight lanes.
The section from Wurzbach Rd. to Callaghan Rd. was
widened from four to eight and 10 lanes.
TransGuide coverage added from Hildebrand Ave. to Camp Bullis Rd.
- 2000-2009: Loop 410
Blvd. to Fulton Ave. was widened from six to 10 lanes.
Dominion Dr. overpass completed and access roads between Camp Bullis
Rd. and Dominion Dr. converted to one-way.
Reconstruction from Camp
Bullis Rd. to Dominion Dr. to raise and lengthen the Camp Bullis
overpass and improve drainage was
The section from Ramsgate Dr. to Loop 1604 was
widened from six to eight lanes.
Conversion of access roads to one-way and other improvements from
Dominion Dr. to Leon Springs completed.
- 2020: The section
from La Cantera Blvd. to Ralph Fair Rd. widened to six lanes plus two
at Woodlawn Ave. looking north in 1949
The freeway ended here and curved up to
courtesy of TxDOT)
I-10 at Frio St. looking
(Photo courtesy of TxDOT)
Snippet of 1953 plan for routing
of US 87 (I-10) in the vicinity Loop 13 (Loop 410)
location of the planned US 87/Loop 13 interchange between Vance-Jackson
Rd. and Jackson-Keller Rd.
(Document courtesy of TxDOT)